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Natural and anthropogenic sources of lead, zinc, and nickel in sediments of Lake Izabal, guatemala

Journal of Environmental Sciences 2020年第10期32卷 117-126页

作者： Elisandra Hernandez Jonathan Obrist-Farner Mark Brenner William F.Kenney Jason H.Curtis Edward Duarte Geosciences and Geological and Petroleum Engineering Department Missouri Uniuersity of Science and Technology.RollaMO 65409USA. Department of Geological Sciences University of FloridaGainesvilleFL 32611USA Land Use and Enuironmental Change Institute Uniuersity of FloridaGainesvilleFL 32611USA Escuela de Quimica Universidad de San Carlos de Guatemala01012Guatermala

Sediments in Lake Izabal,guatemala,contain substantial lead (Pb),zinc (Zn),and nickel (Ni).The lack of historical data for heavy metal concentrations in the sediments makes it difficult to determine the sources or evaluate whether inputs of metals to the lake have changed through time.We measured the relative abundances and concentrations of Pb,Zn,and Ni by X-Ray Fluorescence core scanning and by Inductively Coupled Plasma Optical Emission Spectrometry in three sediment cores to explore stratigraphic distributions of metals in the lake deposits.High amounts of Pb and Zn in the core taken near the Polochic Delta suggest that galena and sphalerite mining increased Pb and Zn delivery to Lake Izabal between ~1945 and 1965 CE.An up-core Ni increase in the core taken near a different mine on the north shore of Lake Izabal suggests that recent nickel mining operations led to an increase in Ni concentrations in the local sediments,but amounts in the other cores indicate that Ni is not widely distributed throughout the lake.Sediment cores from Lake Izabal are reliable recorders of heavy metal input to the lake,and were measured to establish background metal levels,which would otherwise be unavailable.Concentrations of Pb,Zn,and Ni in older,pre-20th-century Lake Izabal sediments reflect input from natural erosion of bedrock.Our results provide previously unavailable estimates of background metal concentrations in Lake Izabal before the onset of mining.These results are necessary for future monitoring related to mining contamination of the lake ecosystem.

关键词： Lake Izabal Heavy metals Lead contamination Anthropogenic impacts Mining guatemala

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Cutaneous leishmaniasis control in Alta Verapaz (northern guatemala): evaluating current efforts through stakeholders' experiences

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Infectious Diseases of Poverty 2021年第3期10卷 14-25页

作者： Renata Mendizabal-Cabrera Isabel Perez Victor Becerril Montekio Freddy Perez Erick Duran Mei L.Trueba Center for Health Studies(CHS) Universidad del Valle de Guatemala(UVG)18 Avenida 11-95zona 15V.H.3Guatemala CityGuatemala Instituto Nacional de Salud Publica(INSP) CuernavacaMexico Communicable Diseases and Environmental Determinants of Health Department Pan American Health OrganizationWashingtonDCUSA. Leishmaniasis Sub-Program National Ministry of Health of GuatemalaGuatemala CityGuatemala Department of Global Health and Infection(GHI) Brighton and Sussex Medical School(BSMS)University of SussexBrightonUK.

Background:Cutaneous leishmaniasis(CL),endemic in guatemala,mostly affects poor people living in the northern region.A national control program that ineludes surveillanee,diagnose,and treatment offered free of cost by the Ministry of Health(MoH)has been in place since 2003.However,the incidence is increasing and treatment rates are not optimal,suggesting that current efforts are not being effective.This study aimed to understand barriers and facilitators of CL control in guatemala as experienced and perceived by key stakeholders in order to comprehend what works well and does not and suggest evidence-informed interventions.Methods:The study was conducted in the Coban municipality,the most endemic of guatemala,situated in the Department of Alta Verapaz.Data were collected during May and June 2019 via focus groups and semi-structured interviews with key stakeholders,including local and national health personnel and residents of four communities of the endemic region.Thematic and content analysis of the collected data was conducted using NVIVO.Results:Three overarching issues hamper the effectiveness of current CL efforts:resource scarcity,treatment challenges,and knowledge-action gaps.Scarce economic resources from the MoH and community residents negatively impact incidence,detection of cases and treatment rates in that preventive action is insufficient and healthcare access is low.In addition,local health workers often lack specialized CL training and access to the national CL control guidelines.With regards to the population living in the study area,misunderstanding of disease causation,shame associated with CL lesions,treatment pain fear,and long(often uncertain)waiting times for diagnose and treatment negatively affect people's willingness to seek help,treatment adherence,and their trust on the healthcare provided.Conclusions:Culturally sensitive CL preventive action must be developed.Given the scarce economic resources available for CL control in the country,the involvement of trained community health workers

关键词： Cutaneous leishmaniasis Control effort Qualitative evaluation Stakeholders'experiences Alta Verapaz guatemala

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Diabetes Management in Resource Poor Countries

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Journal of Diabetes Mellitus 2019年第1期9卷 24-30页

作者： Andrew G. Stratton Coral D. Matus Keith Sweitzer University of Toledo College of Medicine Toledo Ohio USA

The aim of this study was to evaluate the diabetes status and health beliefs of individuals living in villages in Northeast guatemala. Our study explored current understanding of diabetes in the Peten region of guatemala concerning the cause, treatment, and effect of type two diabetes by engaging and interviewing 21 diabetic patients in a qualitative study. Interview results showed that among study participants, the cause of diabetes was often “unknown”. With an average of 3.5 years of education among survey participants and many reporting being mostly or fully illiterate, it is likely that health education status plays a major role in their concept of diabetes. The majority of responses claimed some form of “asusto”—defined as a negative emotional event causing physical maladies—to have caused their diabetes. Patient surveys revealed that Gods and prayer ranked the highest among factors controlling their diabetes, with medications being seen as a tertiary control factor, as seen in Figure 1. Only two study participants (2/21) ranked diet/exercise as more impactful on their diabetes than gods/prayer. Survey responses also show that most individuals agree that taking their medications is important, with the most common reported barriers to control of their blood sugar being cost of medications and lifestyle barriers. Altogether, lack of education and resource availability appears to be the most heavily implicated reasons why uncontrolled diabetes is on the rise in guatemala—it is clear that health education needs to be a major part of therapeutic efforts in this region.

关键词： Type II Diabetes Global Health guatemala Health Education Health Beliefs

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